Improvement in tension-regulators for calico-printing machines



., UNITED STATES PATENT QFFIGE.

JOHN HAWORTH, or DOVER, NEW HAMPSHIRE.

IMPROVEMENT IN TENSION-REGULATORS FOR CALICO-PRINTING MACHINES.

Specificatiomforming part of Letters Patent No. 196,296, dated October 23, 1877; application filed November 24, 1876.

To all whom it may concern:

Be it known that I, JOHN HAWORTH, of Dover, in the county of Strafl'ord and State of New Hampshire, have invented a new and useful Tension-Regulator for Calico-Printing Machines; and do hereby declare the same to be described in the following specification, and

represented in-the accompanying drawings, of

Figure 1 is a front elevation, Fig. 2 an end view, and Fig. 3 a transverse section, of the said tension-regulator.

In calico-printing much difliculty is frequent- 1y experienced in accomplishing what is termed diminishing its pressure on the periphery of the wheel.

These devices I employ in combination with the cloth beam or roller, and also use one or more guides, all being arranged substantially as hereinafter explained.

In the drawings, A denotes the frame for supporting the operative parts.

B, upon which the cloth is wound, and from which it is to be drawn for the purpose of being fed to the tension-roller, from which it passes to the printing-machine.

Above the cloth-beam B is the tension-roller D, below which is a slotted plate or guide, 0. The tension-roller I usually provide with a sleeve or cover, a, of clothor some other suitable materiah On the shaft b of the said roller a friction-wheel, E, is fastened, such wheel being provided with a brake, F.

This brake, as shown, is composed of two bars, a d, bent as represented, so as clasp the periphery of the wheel, the said bars, where above the wheel, being laid together and connected by screws. Where below the wheel the bars are provided with a screw, e, I

Within the lower part of the frame is the beam or roller down through the slotted guide, thence upward over and' partially around the tensionroller, thence downward and partially around the guide-roller, thence upward and across the upper girt h of the frame A, from whence it is led to the printing-machine.

By means of the screw and nut of the brake the friction of the latter on its wheel maybe I increased or diminished, as occasion may require, to vary the tension on the cloth.

I do not claim, for producing tension in the cloth, a brake applied either to the cloth-roller or to another roller in advance of it.

In connection with the brake F, as described, and the pulley or wheel E, the roller D, and the cloth-beam B, I use, in carrying out'my improvement, not only the additional roller G, but the slotted friction-guide G, arranged with the beam and the roller D in manner as shown. 7

While the guide 0 properly guides or directs the cloth in its passage across the upper edge of it, (the said guide,) such guide also performs other functionsthat is, it causes the cloth to be passed backward through, and thence forward under, it, whereby not only is the cloth kept from wrinkling and rising out of place 011' the guide, but is preserved in due relation with.the roller D, and prevented from slackening in front of, or being drawn too freely off the beam. 7

It will be seen that the roller G and the slotted guide, by their arrangement with the roller D, cause the cloth to extend nearly around the entire periphery of the roller, and thereby enable the friction-brake mechanism to operate to better advantage than would be the case were the roller Gr dispensed with.

What, therefore, I claim as my invention 1s- The combination and arrangement, substentially as shown and described, of the upsion-regulator, F v d, substantially as and for per roller 1) and (iowerdrolclger 1% with tle inthe purposes set forth.

termediate slotte gui e an roller a-r- V ranged. in proximity to the guide 0, and a: lit JOHN Q tle below and to one side of the roller D, Witnesses: which has its axis provided with a friction R. H. EDDY, wheel, E, to which is applied a clamp or ten- J. B. SNGW. 

